release_config: various cleanup

- Parse release_config_map.textproto files only once
- Fix inheritance
- Sort flag artifacts by flag name
- Add --all_make option for testing
- Fix value() parsing in crunch_flags

Bug: 328495189
Test: manual
Ignore-AOSP-First: cherry-pick
Merged-In: I577e7fb07171bea9a53d61eaf77ec728b60d7a26
Change-Id: I577e7fb07171bea9a53d61eaf77ec728b60d7a26